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Low B12 levels have been linked to thinning hair, brittle nails, hyperpigmentation, and skin inflammation
However, once diagnosed it presents a difficult management problem in patients suffering from pernicious anemia, as there is no substitute
Conversely, some studies show that a deficiency in vitamin B12 may cause appetite loss, potentially leading to weight loss if left untreated ( If youre low or deficient in B12, your healthcare provider will likely recommend oral vitamin B12 supplements or injections to increase your blood levels ( summary Low levels of vitamin B12 can cause megaloblastic anemia, which is characterized by shortness of breath, headaches, and fatigue
varies by formula) Evidence for weight loss: Limited What to know: Not standardized